This is no problem, the mobile phone scans the code and the results are automatically counted. Since Sivo homing pigeons have been used in our school, it is much more convenient to evaluate classes. Here I briefly talk about the operation method. The administrator must first create a classroom evaluation table in the background of the Xiwo homing pigeon, and the teacher can generate a QR code by clicking on the teaching evaluation in the Xiwo whiteboard teaching mode. Baidu understands that this evaluation form can be edited by itself or directly used as a template. There are many templates that can be used directly. As long as the teacher scans the QR code of the class evaluation, he can fill in all the evaluations in the form, either in words or by taking photos, which saves the evaluation time and makes the evaluation more objective.